Can Rain Affect an HVAC System’s Performance?

HVAC systems are designed to endure rain without damage, provided electrical parts are insulated and waterproofed, and rain can help clean accumulated dirt and dust from the outdoor unit.

Rain can be a significant threat to many devices and appliances powered by electricity, especially when some of their components are installed outside a house. That said, there might be a concern about whether rain affects an HVAC system.

This blog discusses whether rain can impact the performance of an HVAC system.

HVAC Systems Do Fine in the Rain

HVAC systems are well-built and designed to withstand the elements, including rain. Occasional heavy rain won’t damage an HVAC system as long as all electrical parts are properly insulated and waterproofed. Rain can even help wash away any dirt and dust that has accumulated on the outdoor unit, eliminating the concern that it might short-circuit due to the water.

Other Factors That Could Affect HVAC Performance

Though HVAC systems are built to withstand rain, other elements can damage them. Factors that can impact the performance of the unit include:

Storm Damage 

HVAC units won’t get damaged by the rain. However, they’re not protected against debris flying at high speeds during storms. If the unit gets hit by large hailstones, falling branches, or rocks, or is blown over by a strong wind, it should be checked by a heating and cooling services expert.

Flooding

Though the HVAC system is resistant to water, the effects of severe flooding can damage the internal components of the unit. If the flood water is less than 15 inches deep, the HVAC unit should be okay, but any higher than that puts it at risk of water damage. The best course of action in this case is to drain the flooded area immediately following the storm and have professionals check the unit for damage.

Corrosion

In general, HVAC units are built with metals and other materials that are resistant to the effects of moisture. However, they may still be vulnerable to corrosion, especially if they’re not regularly maintained or inspected. Always have a cooling and heating services expert regularly check the unit to detect early signs of corrosion.

Fix My Air DFW of Fort Worth specializes in residential and commercial HVAC services, including routine maintenance, installation, and repair. All makes/models. Call us at (817)839-3511.